Gas-insulated switchgear to boost power reliability in the Ningxia region of northwestern China while securing long distance transmission
The Ningxia Autonomous Region in the northwest of China is home to 6.6 million people. As part of the government’s plan to boost the economic development of this region, economic zones have been developed. To address the needs of growing electricity demand, State Grid Corporation of China (SGCC) build the Qixiang substation which will strengthen and extend the transmission network in the region.
ABB build a 800-kilovolt gas-insulated switchgear (GIS) which is helping to secure power reliability and strengthen power transmission across long distances. At long distances, electricity transmission losses can be significant. The key to increase efficiency with minimum transmission losses is to use ultra-high-voltage power transmission such as 800-kilovolt (kV) or higher. ABB’s GIS will also enable supply reliable power across 2,000 kilometers to reach major cities in the Shangdong and Zhejiang regions in Eastern China.
GIS is a compact metal encapsulated switchgear that uses pressurized insulating gas and enables safe operations in confined spaces while significantly reducing equipment footprint. The 800 kV GIS, a robust solution will secure power transmission with minimum losses while enabling reliable operations in harsh environments, particularly with frequent sandstorms in the area. The compactness of GIS reduces the substation footprint to as little as 10 percent of the space required of an air-insulated switchgear (AIS).
“ABB’s leading GIS technology will boost power reliability in Ningxia region and secure long distance transmission to the eastern part of China”, says Markus Heimbach, Head of ABB’s High Voltage Business Unit within its Power Grids division. “This is another example of how our technology is enhancing grid reliability to meet future power demands in the country.”
In 2018, ABB is celebrating the 50th anniversary of GIS, a technology it pioneered. The compact design of a GIS allows a space saving of up to 70 percent compared to an air-insulated switchgear (AIS) substation. As a market and technology leader in high-voltage GIS technology, ABB offers ratings and applications from 72.5 kV to 1200 kV and has a global installed base of more than 30,000 bays. ABB’s latest offering includes eco-efficient and digital capabilities.
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